PT - JOURNAL ARTICLE
AU - BROOKS, M.
AU - BAYERLY, M.
AU - LLEWELLYN, D. J.
TI - A new geological model to explain the gravity gradient across Exmoor, north Devon
DP - 1977 Apr 01
TA - Journal of the Geological Society
PG - 385--393
VI - 133
IP - 4
4099 - http://jgs.lyellcollection.org/content/133/4/385.short
4100 - http://jgs.lyellcollection.org/content/133/4/385.full
SO - Journal of the Geological Society1977 Apr 01; 133
AB - Recent long seismic lines in South Wales and the Bristol Channel indicate a structural culmination under the southern part of the Bristol Channel, where a layer with a seismic velocity of 6.1 km/s approaches to about 2 km of the surface. It is shown that the gravity field across Exmoor and the Bristol Channel can be explained by a simple geological model in which a thick sequence of relatively low density Lower Palaeozoic or late Precambrian rocks occupies the core of this culmination. The model casts further doubt on the existence of a major thrust under Exmoor.